- Exterior use
- Visible after weeks of weather exposure and jobsite wear
![Irwin® Strait-Line® Permanent Staining Marking Chalks, 5 lb, Red, #IR-65102 (4/Pkg) Irwin® Strait-Line® Permanent Staining Marking Chalks, 5 lb, Red, #IR-65102 (4/Pkg)](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/240570/442721/65102__40705.1666012868.jpg?c=2)
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